1# $OpenBSD: sqroot.m4,v 1.2 1996/06/26 05:36:20 deraadt Exp $ 2# $NetBSD: sqroot.m4,v 1.4 1995/09/28 05:38:01 tls Exp $ 3# 4# Copyright (c) 1989, 1993 5# The Regents of the University of California. All rights reserved. 6# 7# This code is derived from software contributed to Berkeley by 8# Ozan Yigit. 9# 10# Redistribution and use in source and binary forms, with or without 11# modification, are permitted provided that the following conditions 12# are met: 13# 1. Redistributions of source code must retain the above copyright 14# notice, this list of conditions and the following disclaimer. 15# 2. Redistributions in binary form must reproduce the above copyright 16# notice, this list of conditions and the following disclaimer in the 17# documentation and/or other materials provided with the distribution. 18# 3. All advertising materials mentioning features or use of this software 19# must display the following acknowledgement: 20# This product includes software developed by the University of 21# California, Berkeley and its contributors. 22# 4. Neither the name of the University nor the names of its contributors 23# may be used to endorse or promote products derived from this software 24# without specific prior written permission. 25# 26# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36# SUCH DAMAGE. 37# 38# @(#)sqroot.m4 8.1 (Berkeley) 6/6/93 39# 40 41define(square_root, 42 `ifelse(eval($1<0),1,negative-square-root, 43 `square_root_aux($1, 1, eval(($1+1)/2))')') 44define(square_root_aux, 45 `ifelse($3, $2, $3, 46 $3, eval($1/$2), $3, 47 `square_root_aux($1, $3, eval(($3+($1/$3))/2))')') 48